defmodule ToweropsWeb.StatusPageLive do
  @moduledoc """
  Public unauthenticated status page.

  Renders at /status/:slug with a standalone layout (no sidebar).
  Mobile-responsive for customers checking during outages.
  """
  use ToweropsWeb, :live_view

  alias Towerops.StatusPages

  @impl true
  def mount(%{"slug" => slug}, _session, socket) do
    case StatusPages.get_config_by_slug(slug) do
      nil ->
        {:ok,
         socket
         |> put_flash(:error, "Status page not found")
         |> assign(:not_found, true)
         |> assign(:page_title, "Not Found")}

      config ->
        _ =
          if connected?(socket) do
            _ = Phoenix.PubSub.subscribe(Towerops.PubSub, "status_page:#{config.id}")
          end

        components = StatusPages.list_components(config.id)
        active_incidents = StatusPages.list_active_incidents(config.id)
        recent_incidents = StatusPages.list_incidents(config.id, limit: 10)
        overall = StatusPages.overall_status(components)

        {:ok,
         socket
         |> assign(:config, config)
         |> assign(:components, components)
         |> assign(:active_incidents, active_incidents)
         |> assign(:recent_incidents, recent_incidents)
         |> assign(:overall_status, overall)
         |> assign(:not_found, false)
         |> assign(:page_title, "#{config.company_name || "Status"} — System Status"), layout: false}
    end
  end

  @impl true
  def handle_info({:status_updated, _}, socket) do
    config = socket.assigns.config
    components = StatusPages.list_components(config.id)
    active_incidents = StatusPages.list_active_incidents(config.id)
    overall = StatusPages.overall_status(components)

    {:noreply,
     assign(socket,
       components: components,
       active_incidents: active_incidents,
       overall_status: overall
     )}
  end

  def handle_info(_, socket), do: {:noreply, socket}

  # -- Helpers --

  @doc false
  def overall_color(:operational), do: "bg-green-500"
  def overall_color(:degraded), do: "bg-yellow-500"
  def overall_color(:partial_outage), do: "bg-orange-500"
  def overall_color(:major_outage), do: "bg-red-500"
  def overall_color(:maintenance), do: "bg-blue-500"
  def overall_color(_), do: "bg-gray-500"

  @doc false
  def overall_text(:operational), do: "All Systems Operational"
  def overall_text(:degraded), do: "Degraded Performance"
  def overall_text(:partial_outage), do: "Partial System Outage"
  def overall_text(:major_outage), do: "Major System Outage"
  def overall_text(:maintenance), do: "Scheduled Maintenance"
  def overall_text(_), do: "Unknown"

  @doc false
  def component_color("operational"), do: "bg-green-500"
  def component_color("degraded"), do: "bg-yellow-500"
  def component_color("partial_outage"), do: "bg-orange-500"
  def component_color("major_outage"), do: "bg-red-500"
  def component_color("maintenance"), do: "bg-blue-500"
  def component_color(_), do: "bg-gray-400"

  @doc false
  def component_label("operational"), do: "Operational"
  def component_label("degraded"), do: "Degraded"
  def component_label("partial_outage"), do: "Partial Outage"
  def component_label("major_outage"), do: "Major Outage"
  def component_label("maintenance"), do: "Maintenance"
  def component_label(s), do: s

  @doc false
  def severity_color("critical"), do: "text-red-600"
  def severity_color("major"), do: "text-orange-600"
  def severity_color(_), do: "text-yellow-600"

  @doc false
  def incident_status_label("investigating"), do: "Investigating"
  def incident_status_label("identified"), do: "Identified"
  def incident_status_label("monitoring"), do: "Monitoring"
  def incident_status_label("resolved"), do: "Resolved"
  def incident_status_label(s), do: s
end